Malicious PDF — malware analysis report

Static analysis result for SHA-256 faea5a7c7ccfa0d1…

MALICIOUS

PDF

35.0 KB Created: 2020-09-01 02:30:59 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: eeba4cbcfe39bbb7e369f5bf39282186 SHA-1: dc1cbee911bc1ffe9c5f6f190d565fb53b6ed55b SHA-256: faea5a7c7ccfa0d18cf70cf5ee1674d9214f8d00b7af6e7b0ba84e889dabf4cd
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.002 Malicious Link

The PDF file exhibits characteristics of a link farm, containing numerous embedded URLs. One of these URLs, 'https://ttraff.cc/wix?keyword=myriad+pro+bold+semi+condensed+free', is identified as a known malicious redirector. The ML classifier also strongly flagged this PDF as malicious. The presence of a link farm suggests an attempt to distribute malicious content or engage in SEO poisoning, likely leading users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://ttraff.cc/wix?keyword=myriad+pro+bold+semi+condensed+free
    • https://static.usrfiles.com/ugd/c33cdb_b8ecd4c8556a4d9db223b14b4cabe9fc.pdf
    • https://static.usrfiles.com/ugd/b8c837_259b529153ee4d06878348b75a9551b3.pdf
    • https://static.usrfiles.com/ugd/930050_cc3452b193a340ffb2a2e5c580671945.pdf
    • https://static.usrfiles.com/ugd/b8c837_82e8055f5a22495692bf1ad55f98445c.pdf
    • https://cdn.shopify.com/s/files/1/0457/3347/8566/files/buncefield_report.pdf
    • https://static.usrfiles.com/ugd/d01287_7c4b597076124d85811472c989dd3c46.pdf
    • https://static.usrfiles.com/ugd/8b49c6_5d01c0fb07af4d3da6780ffdfe59d631.pdf
    • https://static.usrfiles.com/ugd/05301a_284803e88b2543e79b34110e6f65916c.pdf
    • https://cdn.shopify.com/s/files/1/0430/6839/1591/files/general_caste_list_in_bihar.pdf
    • https://cdn.shopify.com/s/files/1/0431/6944/8097/files/34372851120.pdf
    • https://cdn.shopify.com/s/files/1/0431/4592/0669/files/70263395422.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00004a88.bin
d6fe78c5c3c008728d800c8be3969602e99009572110da75fb910bb63cb78a8c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x4A88 5548 bytes
font_01_sfnt_off00005d5e.bin
582bedfea7c4124a8a46faec94ec120d317485892038cb126868408f843c1eea		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5D5E 10012 bytes

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